Adaptive Sidebar

In my sidebar I have a ‘which page out of total pages’ and navigation for next and previous page section. When it is in the permalink SINGLE.php it is no longer there (as it’s not applicable).

I wanted to know if I can instead have the next and previous POST links (ideally with total posts too) there instead, where the PAGE navigation used to be…

Is there any way to make a conditional parameter where something shows only if it is in SINGLE.php and not INDEX in the sidebar.php??